Microsoft Windows Server 20H2 vulnerabilities, page 2
53 vulnerabilities
Known vulnerabilities in Microsoft Windows Server 20H2, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2021-34486microsoftwindows_10_1809+15KEV
EPSS score9.25%
Windows Event Tracing Elevation of Privilege VulnerabilityCVE-2021-34527microsoftwindows_10_1507+33KEVRansomwareEPSS score99.79%
A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability.
In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (Note: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ):
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint
NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)
UpdatePromptSettings = 0 (DWORD) or not defined (default setting)
Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design.
UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates.
Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.CVE-2021-33771microsoftwindows_10_1507+26KEVEPSS score10.17%
Windows Kernel Elevation of Privilege VulnerabilityCVE-2021-33739microsoftwindows_10_1909+11KEVEPSS score6.55%
Microsoft DWM Core Library Elevation of Privilege VulnerabilityCVE-2020-1472alpinesamba+63KEVRansomwareEPSS score99.39%
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network.
To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access.
Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels.
For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020).
When the second phase of Windows updates become available in Q1 2021, customers will be notified via a revision to this security vulnerability. If you wish to be notified when these updates are released, we recommend that you register for the security notifications mailer to be alerted of content changes to this advisory. See Microsoft Technical Security Notifications.CVE-2022-21971microsoftwindows_10_1809+16KEVEPSS score53.78%
Windows Runtime Remote Code Execution VulnerabilityCVE-2022-21919microsoftwindows_10_1507+36KEVEPSS score2.43%
Windows User Profile Service Elevation of Privilege VulnerabilityCVE-2022-21999microsoftwindows_10_1507+36KEVRansomwareEPSS score41.01%
Windows Print Spooler Elevation of Privilege VulnerabilityCVE-2022-21882microsoftwindows_10_1809+16KEVRansomwareEPSS score59.20%
Win32k Elevation of Privilege VulnerabilityCVE-2022-26925microsoftwindows_10_1507+36KEVEPSS score10.48%
Windows LSA Spoofing VulnerabilityCVE-2022-26904microsoftwindows_10_1507+36KEVEPSS score16.95%
Windows User Profile Service Elevation of Privilege VulnerabilityCVE-2022-22047microsoftwindows_10_1507+34KEVEPSS score18.77%
Windows Client Server Run-time Subsystem (CSRSS) Elevation of Privilege VulnerabilityCVE-2022-22718microsoftwindows_10_1507+36KEVEPSS score18.46%
Windows Print Spooler Elevation of Privilege VulnerabilityCVE-2022-24521microsoftwindows_10_1507+36KEVRansomwareEPSS score7.13%
Windows Common Log File System Driver Elevation of Privilege VulnerabilityCVE-2022-30190microsoftwindows_10_1507+31KEVRansomwareEPSS score99.16%
A remote code execution vulnerability exists when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, or delete data, or create new accounts in the context allowed by the user’s rights.
Please see the MSRC Blog Entry for important information about steps you can take to protect your system from this vulnerability.CVE-2022-34713microsoftwindows_10_1507+31KEVEPSS score67.76%
Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution VulnerabilityCVE-2022-35754microsoftwindows_10_1507+26EPSS score0.41%
Unified Write Filter Elevation of Privilege VulnerabilityCVE-2022-35755microsoftwindows_10_1507+24EPSS score9.79%
Windows Print Spooler Elevation of Privilege VulnerabilityCVE-2022-35747microsoftwindows_10_1507+34EPSS score1.68%
Windows Point-to-Point Protocol (PPP) Denial of Service VulnerabilityCVE-2022-35748microsoftwindows server 2012+10EPSS score47.23%
HTTP.sys Denial of Service Vulnerability